Grade 5 Titanium vs. Nuclear Grade Hafnium
Grade 5 titanium belongs to the titanium alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is grade 5 titanium and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 78 |
| Elongation at Break, % | 8.6 to 11 | |
| 25 |
| Poisson's Ratio | 0.32 | |
| 0.26 |
| Shear Modulus, GPa | 40 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1190 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 910 to 1110 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 140 |
| Thermal Expansion, µm/m-K | 8.9 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.4 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 110 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3980 to 5880 | |
| 180 |
| Stiffness to Weight: Axial, points | 13 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 35 | |
| 11 |
| Strength to Weight: Axial, points | 62 to 75 | |
| 7.4 |
| Strength to Weight: Bending, points | 50 to 56 | |
| 8.4 |
| Thermal Shock Resistance, points | 76 to 91 | |
| 55 |
Alloy Composition
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| Aluminum (Al), % | 5.5 to 6.8 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Oxygen (O), % | 0 to 0.2 | |
| 0 |
| Titanium (Ti), % | 87.4 to 91 | |
| 0 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 |
| Yttrium (Y), % | 0 to 0.0050 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.23 |